function isData() {
    var t = document.getElementsByClassName("plus"), e = document.getElementsByClassName("minus"),
        n = document.getElementsByClassName("product");
    t && Array.from(t).forEach(function (t) {
        t.addEventListener("click", function (e) {
            parseInt(t.previousElementSibling.value) < e.target.previousElementSibling.getAttribute("max") && (e.target.previousElementSibling.value++, n) && Array.from(n).forEach(function (t) {
                updateQuantity(e.target)
            })
        })
    }), e && Array.from(e).forEach(function (t) {
        t.addEventListener("click", function (e) {
            parseInt(t.nextElementSibling.value) > e.target.nextElementSibling.getAttribute("min") && (e.target.nextElementSibling.value--, n) && Array.from(n).forEach(function (t) {
                updateQuantity(e.target)
            })
        })
    })
}

isData();